MathematicsMedium110×since 2002Q3798The number of functions f from {1, 2, 3, ...., 20} onto {1, 2, 3, ...., 20} such that f(k) is a multiple of 3, whenever k is a multiple of 4, is :A6⁵ ×\times× (15)!B5⁶ ×\times× 15C(15)! ×\times× 6!D5! ×\times× 6!Check answerSkip